LED MODULE WITH LED CHIP GROUPS

• US 20150338041A1
• Filed: 12/09/2013
• Published: 11/26/2015
• Est. Priority Date: 12/20/2012
• Status: Abandoned Application

• Current Assignee: Tridonic Jennersdorf GMBH (Zumtobel Group AG)
• Original Assignee: Tridonic Jennersdorf GMBH (Zumtobel Group AG)
• Inventors: WIMMER, Florian, GUMHOLD, Juergen
• Application Number:
  US14/654,370
• Publication Number:
  US 20150338041A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21S 9/024 using a supplementary light source for emergency lighting
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

An LED module, having a carrier, a first group and a second group of LED chips arranged on the carrier, optionally one or more further groups of LED chips, and a layer covering all LED chips and containing at least one color conversion material, which converts the spectrum of the LEDs of one or all groups into a spectrum with a different dominant wavelength. Every group comprises at least one LED chip, preferably a plurality of LED chips. The LED chips of one group are preferably connected in series and can be supplied starting from the same electrical supply. The LED chips of different groups can be supplied independently of one another, starting from different electrical supplies.

Claims

1. An LED module, comprising:

a carrier,

a first group and a second group of LED chips arranged on the carrier, and

a layer covering all of the LED chips and containing at least one color conversion substance which converts the spectrum of the LEDs of one or all of the groups into a spectrum having a different dominant wavelength,

wherein;

each group comprises at least one, preferably a plurality of LED chips,

the LED chips of a group are preferably connected in series and are suppliable proceeding from the same electrical supply, and

the LED chips of different groups are suppliable independently of one another proceeding from different electrical supplies.

2. The LED module as claimed in claim 1, wherein the covering layer is applied above/on the LED chips in particular in a “

dam-and-fill”

method or by means of a dispensing method, e.g. as ball head or globe-top.

3. The LED module as claimed in claim 1, wherein the color conversion substance contains a phosphor, in particular.

4. The LED module as claimed in claim 1, wherein the radiation emitted by the LED chips of the first and second groups is light in the visible spectrum.

5. The LED module as claimed in claim 1, wherein the LED chips of the second group emit radiation preferably in the red spectrum, and/or wherein the radiation emitted by the LED chips of the second group is not converted by the at least one color conversion substance in the covering layer.

6. The LED module as claimed in claim 1, wherein the LED chips of the first and second groups are substantially identical.

7. The LED module as claimed in claim 1, wherein the light power of the second group of LED chips is in a range of 1%-25%, preferably in a range of 5%-10%, of the light power of the LED chips of the first group, and/or wherein the number of LED chips of the second group corresponds to 1%-25%, preferably 5%-15%, of the number of LED chips of the first group.

8. The LED module as claimed in claim 1, wherein the LED module comprises at least one first conductor for connecting the LED chips of the first group to one terminal for connecting the first group to a first electrical supply and at least one second conductor for connecting the LED chips of the second group to another terminal for connecting the second group to a second electrical supply, wherein the conductors are arranged on the carrier.

9. The LED module as claimed in claim 1, wherein the conductors are arranged at least partly on that side of the carrier on which the LED chips are arranged, and/or wherein the conductors are arranged at least partly on that side of the carrier on which the LED chips are not arranged.

10. The LED module as claimed in claim 1, wherein the terminals on the carrier are arranged such that they are opposite one another and/or are arranged at least partly substantially parallel to one another, and/or wherein terminals are provided on one module side or mutually opposite module sides.

11. The LED module as claimed in claim 1, wherein the conductors are at least partly not covered by the covering layer.

12. The LED module as claimed in claim 1, wherein the carrier is a circuit board or an SMD carrier.

13. An LED luminaire, comprising at least one LED module as claimed in claim 1, and a respective independent electrical supply for each group of LED chips.

14. The LED luminaire as claimed in claim 13, wherein the electrical supplies are designed as voltage/current supplies in such a way and that only ever one group of LED chips is operated at the same time.

15. An LED-based emergency light luminaire, comprising at least one LED luminaire as claimed in claim 13, wherein at least one group of LED chips is operable proceeding from a first electrical supply and at least one group of LED chips is operable proceeding from a second electrical supply, which is independent of the first electrical supply.

16. The LED-based emergency light luminaire as claimed in claim 15, comprising

an energy store, preferably a battery or a rechargeable battery, a terminal for connecting the emergency light luminaire to a first electrical supply, in particular a power supply system voltage, and an identification circuit designed to identify an interruption of the first electrical supply, wherein the emergency light luminaire is designed to operate at least the LED chips of one group of at least one LED module when the first electrical supply is present, and to operate at least the LED chips of another group when an interruption of the first electrical supply is identified by the identification circuit.

17. The LED-based emergency light luminaire as claimed in claim 15, wherein

the emergency light luminaire operates the other group proceeding from a second electrical supply, in particular proceeding from the energy store.

18. The LED-based emergency light luminaire as claimed in claim 1, wherein the emergency light luminaire is designed to operate one LED module as claimed in claim 1 and another LED module, wherein the other LED module comprises only one group of LED chips, and wherein the emergency light apparatus operates the LED chips of one group of the LED module and/or the other LED module when the first electrical supply is present, and/or only operates the LED chips of the other group in the event of a failure of the first electrical supply, and wherein the LED chips of the LED module and the LED chips of the other LED module are arranged identically, preferably in an identical predetermined grid, and/or wherein the LED chips of the LED modules correspond to one another in terms of their number.

19. The combination of one LED module as claimed in claim 1 with another LED module comprising only a single group of LED chips, wherein the LED chips of both modules are arranged in an identical predetermined grid, and/or substantially correspond to one another in terms of their number.

20. (canceled)